Record winds have created a massive sandstorm which hit Tehran on Monday, plunging the Iranian capital into darkness, damaging buildings, and killing at least four people.

The disaster struck at 5:10 p.m. local time, knocking out power
supplies and sending residents to rush for cover. The wind,
reported at 110 kilometers per hour, snapped trees and sweeped
debris across streets.

The fatalities were caused by fallen trees, ISNA said. At least
27 others were injured, 10 of them in a road accident when the
gloom suddenly descended, according to Amin Sabernia, Iran's
chief emergency official.